DE3020836A1 - Fireproof panel with plastic foam core - has blade-shaped additional tongues and screws holding all edges together - Google Patents

Abstract

The composite panel comprises two metallic covering layers and a core of plastic foam, the edges forming tongued and grooved joints held together by screws. Each covering layer forms an additional tongued and grooved joint with inserted seal. The additional tongues (10,11) are blade-shaped, and the screw (17) holds all edges (6,7,10,11) directly together. The blade- shaped tongues can be formed by bending through 180 deg., and the screw can pass through all edges in two places. The screw can be of the self-tapping type.

Description

HOESCH Werke Aktiengesellschaft
Eberhardstrasse 12, 46OO Dortmund 1

Composite element made up of two outer layers and one Core layer made of plastic foam

The invention relates to a composite element made of two metallic cover layers and a core layer Plastic foam with a tongue and groove connection resulting edges held by a screw connection, with each cover layer having a smaller additional tongue and groove joint forms with a seal inserted therein.

Such connecting elements are in various designs known. In one embodiment of US Pat. No. 3,828,493, the auxiliary jut spring connections are arranged diagonally in the joint area. The additional springs have a relatively large thickness and the screw only extends through one edge. This ensures the sealing effect is particularly good in the event of a fire In need of improvement, due to the thickness of the additional springs the surface pressure on the seal and thus its ability to compress remains small. Art of the screw connection, in the event of a fire there is still a gaping of the joint with harmful effects of the fire gases favored on the core layer.

The same applies to a composite element described in DE-OS 2 ^l ik 9 9I7, in which the additional tongue and groove connections are arranged one above the other,

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land the core layer inclined contact surfaces having.

The invention has for its object to improve a composite element such that a greater tightness of the edge connection achieved and especially in the event of a fire, a gaping of the Edge connection and an entry of the fire gases are largely avoided.

According to the invention, it is proposed for a composite element of the type described at the outset that that the additional springs are designed in the shape of a cutting edge and the screw connection all the edges of the Holds top layers immediately.

As a result, a high surface pressure and a large surface pressure can be achieved with relatively small contact pressures Tightness can be achieved, and by all Screw connections that hold the edges directly, this contact pressure situation is largely also in the event of fire guaranteed. In addition, rattling noises when exposed to wind are avoided.

In a further embodiment of the inventive idea The additional springs can advantageously be formed by bending over by 180.

A particularly stable mounting of the composite element edges can be achieved if the Screw connection through all edges twice,

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The screw connection can be designed as a thread-forming screw, whereby when screwed in from the inside it is not visible from the outside.

According to a further feature of the invention, the seal is particularly advantageously made of automatically foaming material in the event of fire, which fills the interiors of the edge joint with a non-combustible material and which are called Keeps fire gases from the plastic foam behind the cover layers.

In the case of larger composite element thicknesses, the core layer can also have a central tongue and groove connection Form, which is protected against damage by the edges.

The invention is explained in more detail below with reference to exemplary embodiments shown schematically in the drawings.
They show in detail:

Fig. 1 shows the edge area of a composite element with superimposed additional tongue and groove connections before pushing together and

Fig. 2 in the assembled state

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3 shows an edge connection with diagonally arranged Additional tongue and groove connections before pushing together and

4 in the assembled state,

Fig. 5 shows an edge connection with additional, Middle tongue and groove connection.

According to FIG. 1, one edge 1 of the composite element is a groove 2 and the other edge 3 designed as a spring 4. This becomes the tongue and groove connection 5 according to FIG. 2 educated.

The sheet metal edges 6, 7 form additional grooves 8, 9 » the additional groove tongue connections which are smaller with the additional springs 10, 11 12, 13 of the same top layer 14, 15 result.

The same applies to those arranged diagonally Additional tongue and groove connections of the embodiment according to FIG. 3

In the additional grooves 8, 9 are. Seals l6 inserted, which in cooperation with the blade-shaped additional springs 10 ,. 11 for smaller contact pressures ensure a high level of tightness.

The position of the sheet metal edges 6, 7 and additional springs 10, 11 to one another is determined by thread-rolling screws 171 l8 secured. The screw engages through this

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all sheet metal edges 6, 7 and additional springs 10, 11 double (Fig. Ί).

According to FIG. 5, the core layer 19 additionally forms a center tongue and groove connection 20 with an inserted Sealing strips.

When the seals 16 and possibly also the sealing strip 21 are formed, automatically in the event of a fire foaming material would be the core layer 19 protected by filling the gap 22.

• With all forms of filling, a narrow line joint 23 or a wider gap 2k can be achieved by appropriately designing the sheet metal edges.6, 7 for the case at hand. The large bending radii largely prevent paint or zinc cracks on the visible edges.

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1 edge 2 Groove 3 edge 4th feather 5 Jt f
Only ted erν inheritance 6th Sheet edge 7th Sheet edge 8th Additional groove 9 Additional groove 10 Additional spring 11 Additional spring 12th Additional tongue and groove connection 13th Additional tongue and groove connection 14th Top layer 15th Top layer 16 Seal tmg 17th Screw connection, screw 18th Screw connection, screw 19th Core layer 20th With 11 m groove for connection 21st Sealing strips 22nd Space 23 Line joint 24 gap

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Claims (3)

Hoosch Werke Aktiengesellschaft Eborhardstr. 12, kCOO Dortmund 1 claims 1. Composite element made of two metallic cover layers and a core layer of plastic foam with a tongue and groove preparation ex "- giving edges held by a screw connection, Afobei each cover layer forms a smaller additional tongue and groove connection with an inserted seal, as marked by that the additional springs ( 10, 11) are designed in the shape of a cutting edge and the screw connection (l7j l8) holds all the edges (6, 7 and 10, ll) of the cover layers in place. 2. Bundle element according to claim 1, characterized in that that the cutting edge additional springs (10, 11) are formed by bending over 180. 3. Composite element according to claims 1 and 2 _5, characterized in that the screw connection (l8) all edges (6, 7 and 10, 11) each double through ch gr eif t. ^l i. Composite element according to Claims 1 - 3i, characterized in that the screw connection is a thread-forming screw. 1300S0 / 0219 ORIGINAL INSPECTED 5 · Composite element according to claims 1 to 4 characterized in that the seal (16, 21) consists of automatically foaming in the event of fire Material. 6 «, composite element according to one or more of the The preceding claims, characterized in that the core layer (l9) has a central tongue and groove connection forms. 130050/0219